Piece placer and puller attachment for lathes



7, H. R. MOORE 1,896,366

PIECE PLACER AND FULLER ATTACHMENT FOR LATHES Filed Aug. 27, 19 30 um gg- M 1; H g N i W INVENTOR.

BY M ATTORNEY,

Patented Feb. 7, .1933

- UNITEDSTATES HERALD a; moose; or FORT WAYNE, INDIANA rmcnrmcnn Ann PULLER ATTACHMENT roR LATHEs This invention'relates to improvements in piece placer and puller attachments for latches, and the object thereof is to'provlde means for mounting a pieceof work in.prec 1se position in a latheeto be dressed therein and by which said piece after being dressed may be quicklyremoved and replaced by another similar piece so as to facilitate rapid manufacture thereof.

An illustrative embodimentoffthe invention is shown in the accompanying drawing, in which Fig. 1 is a plan view of a structure embodying the invention applied to a turretdathe, portions being broken away and in sectlon;

Fig. 2 is a side elevation of the piece placer and puller, a portion being broken away;

Fig. 3 is an end elevation projected from Fig. 2; and Fig. 4 is a side elevation of an adapter attachable to the appliance for use in handling undersized work pieces.

The structure shown in the drawing consists of a stub-shaft 1 adapted to be secured in operating position in a turret 2 so as to be held in alinement with the axis of the lathe, the shaft being secured in the turret in any suitable manner such as by a screw 3. The outer end of the sub-shaft 1 has an axial bore 4, the inner end of which is threaded as indicated by 5.

Upon the stub-shaft is secured a yoke 6 by means of a bolt 7 which passes transversely through the shaft, the respective ends of the bolt extending through the corresponding ends of the yoke. Preferably, each end of the yoke has a circular lug 8 that extends from its inner face into a recess 9 made in the stubshaft in which the lug turns when the yoke is swung upon the bolt 7. The front endlO of the yoke has a slot 11 that opens through one side therein and has a slotted plate 12 secured upon its inner face by means 0 screws 13.

A mandrel 14 is secured in the collet 15 of the lathe in the usual manner and is provided with an annular shoulder 16 that bears against the corresponding face of the collet so as to limit inward movement of the man- 50 drel with respect to the collet. The mandrel A pplicati onfile dlugust27,1930. Serial lea-4.73997;

has a forwardly extending spindlel'i' provided with a series of slots 18'that extend partway throughout its length, and said spindlehas a shoulder that constitute a stop19 against which a workpiece 20. is positioned when. placed thereon. The forward 'portion' of the spindle particularly from the shoulder 19 to its forward end is tapered, andthe bore 21.0f said spindlev is also tapered","approxi- H, mately th oughout thelength of'the slots '18 therein. I An adjusting bolt 22 is positionedin the bore 23 of the nandreland extends through the bore 21 of'the spindle;- The head24 has threaded relation with .the mandrel in the threaded bore thereof, and the opposite end of the bolt has a straight threaded portion 25 that projects beyond the endofjthe spindle andhas a nut 26 thereon. Also, the middle t portion 27 of the bolt is'tapered and fitsithe taper bore 21 of the spindle so that upon longitudinal adjustment of the bolt ,toward the outer end of the" spindle causes radial expansionof the slotted portion'ofthe spindle- In this manner the circumference of that portion of the spindle adjacentthefstop19 may be adjustably varied so" as'to accommodate the work-piece 2O when positioned there on. This adj ustrn'entlis m adeso that the work- Y, piece 20, when forcibly pressed lengthwise upon the spindle'up against theshoulder'l9, will be held firmly in frictional contact with the spindle whereby the work-piece iscaused to revolve as the spindle rotates. The bolt 27 is heldin adjusted portions by means: of a set-screw 28 which is disposedin the mandrel, and by the nut 26 on the threaded end of the bolt which bears againstthe corresponding end of the spindle. I

1 In'operation, the turret 2 is moved back until the stub-shaft 1 is spaced a suflicient distance from the spindle to: permitpla cing of the work-piece 2Oont0 the end of the spindle, and subsequentlythe turret is moved toward the c'ollet in the head-stock ofthe lathe. During this operation the "workpiece is "engaged by the outer end of the stub-shaft and moved forcibly onto the spindle: againstthe stop 4 19.

The turret-is then'backed away to it f m position and the work-piece is dressed in the usual manner by applying one or more tools thereto. After the dressing operation is completed the turret is again moved toward the collet and the yoke is then swung upon the bolt 7 so as to bring the plate into position between the work-piece and the shoulder 16 and astride of the; spindle. While the yoke is thus positioned, the turret is again backed oil. so that the work-piece on the spindle becomes engaged by the slotted plate 12 in the yoke and is forcibly withdrawnfromith'e spindle. The 11 work-piece is then replaced in like manner upon the spindle by "another similar workpiece and dressed as in the first instance. p The bore 4 of the stub-shaft is of such diameter as to permit free movement of the stub shaft over the spindle and'is. threaded .asindicated by5gso that an adapter consistingof a sleeve-430 having a threaded end. 31 may be p0: Sitionedin the'hollow stub-shaft and applied toa comparatively smaller work-piece. Also, tllQgSlOttQd plate .12 .may be replaced in the yoke by asimilarplate slottedvto suit the particular. size. of the work-piece. Also, spins dles ojf various sizes may be made to suit the requirements of the work-pieces to be dressed.

v:Aparticular advantage of the invention is thatlthe work-pieces may bepositioned upon and removed from the spindle during rotation of the spindle without interrupting the rotary action thereof, and thus both time and efi'ortareconserved, and alsoa further advantage is realized in thatmanywork-pieces of similar dimensions may be accurately placed in position for dressing so that uni; 'formityin the dressing operations is faoilis tated.

' .-1. iImanappliance-of the class described, arotatably mounted hollow spindle provided ,witlra series .of longitudinally disposed slots, thexs'lottefd portion-of said spindle being tapered internally and externally, ashoulder on the exterior ofthespindle constituting :a stop, a bolt adjustably positioned having a tapered I-portion extending, into said spindle adaptedito expand said spindle, a stub-shaft mounted so ,astohave longitudinal movement oneend of-which has albore for thereception on said shaft having a portion extending beyond one end of said shaft adapted to engage a work-piece located on said spindle when said spindle is received in said shaft so that upon withdrawal of said shaft from said spindle said work-piece is removed therefrom.

4, In an appliance of the class described, a rotatablygmounted hollow spindle provided with an'external shoulder, a portion'of said spindlehaving longitudinal slots made therein; thesie'ndsof which slots terminate at points spaced from the corresponding ends of the sp'indle' afid oppositely with respect to said shoulder, a bolt adjustably positioned having atapered 'portionprojected into the slotted portionof the spindle adapted toexpand same, a fhollowstub-shaft mounted; so as to have longitudinal Inovementadapted to re- .ceiveoneend o'f'thespindlein its bore, a yoke pivoted on. saidfstub-shaft the outer end of which yokerist slotted and adapted to straddlethe spindle at apoint thereon beyond said shoulderwhen said spindle extends into said stub-shaft, and means for actuating said stubs-shaft. x

testimony whereofI aflix my signature.

HERALD R. MOORE.

o'f-one, end of the spindle, ayoke, the arms of received in said. shaft, at. a point spaced from i the corresponding end of said shaft.

' .Anappliance of the class described comprising a hollow stub-shaftadapted to receive .a-apindle in-its bore, and amember pivoted 

